Rotary type oil or water pump

ABSTRACT

This invention relates to a rotary type oil or water pump in which a convoluted stator is provided in which a helical screw rotor operates to force liquid to the surface. I provide a pump in which pump failures are reduced due to preventing the accumulation of fine sand or silt in the pump by providing a spring-pressed check valve which automatically opens to eject sand or silt when excessive weight of this accumulation bears against a check valve. I also provide a means of raising or lowering the pump and the operating parts thereof by a single run of the pump either into or out of the well.

United States Patent 91 Becker ROTARY TYPE OIL OR WATER PUMP [76] Inventor: John G. Becker, 260 Euclid Ave.,

Long Beach, Calif, 90803 [22] Filed: May 15, I972 [21] Appl. No.: 253,165

[52] US. Cl 417/310, 166/68, 166/106, 417/448, 418/48 [51] Int. Cl. F04b 49/00, F04b 47/02 [58] Field of Search 418/48; 417/448, 417/449, 450, 310; 166/68, 105, 106, 181

[56] References Cited UNITED STATES PATENTS 2,749,992 6/1956 I-Iill 418/48 X 3,289,761 12/1966 Smith eta] 166/181 X FOREIGN PATENTS OR APPLICATIONS 972,796 10/1964 Great Britain 418/48 [451 Aug. 21, 1973 Primary Examiner-Carlton R. Croyle Assistant Examiner--Richard Sher Attorney-Harold A. Dreckman [5 7] ABSTRACT This invention relates to a rotary type oil or water pump in which a convoluted stator is provided in which a helical screw rotor operates to force liquid to the surface. I provide a pump in which pump failures are reduced due to preventing the accumulation of fine sand or silt in the pump by providing a spring-pressed check valve which automatically opens to eject sand or silt when excessive weight of this accumulation bears against a check valve. I also provide a means of raising or lowering the pump and the operating parts thereof by a single run of the pump either into or out of the well.

6 Claims, 3 Drawing Figures ROTARY TYPE OIL R WATER PUMP An object of my invention is to provide a releasable coupling means on the pump which enables the pump to be either raised or lowered in the well as desired.

Still another object is to provide a spring-pressed check valve in the pump which will automatically open when unusual weight is applied thereto.

Still another object is to prevent the intrusion of sand or silt in the pump and thus reducing the wear on the pump, also the pump will not become sand locked or frozen up due to accumulation of sand or silt.

Other objects, advantages, and features of invention may appear from the accompanying drawings, the subjoined detailed description and the appended claims.

In the drawings:

FIG. 1 is a longitudinal sectional view of my rotary type pump.

FlG. 2 is a fragmentary longitudinal sectional view of the lower portion of my pump.

FIG. 3 is a sectional view taken on line 33 of FIG. 1.

Referring more particularly to the drawing, the numeral 1 indicates a casing in which my pump operates. The numeral 2 indicates a sleeve which is non-rotatably mounted within the casing l by means of packing collars 3 and 4 which frictionally engages the casing 1 and holds the sleeve 2 against rotation. The sleeve 2 is closed at the bottom as shown at 5 to facilitate the flow of water or oil as will be subsequently described. A ring 6 is provided at the upper end of the sleeve 2, and this ring is connected to a collar 7 by the straps 8. Fluid flows into the casing 1 through the usual perforation in that casing and is forced to the surface by the pump 9. The pump includes a stationary helically shaped stator 10 and a rotor 11 which fits within the stator. The rotor l 1 is affixed to the lower end of the tubing 12 and is rotated from the surface by a suitable power means. The rotor 11 has a hole 13 extending from top to bottom and opens into the tubing 12 where it is pumped to the surface. A collar 14 is provided at the upper end of the rotor 11, and this collar is provided with outwardly projecting pins 15 which are in the position as shown in F IG. 1 when the pump is operating to lift fluid. A J slot 16 is provided in the stator 10 of the pump and is engaged by the pins 15 when it is desired to lift the pumpassembly to the surface.

At the lower end of the pump barrel 17, I provide a sump 18 into which oil flows as the rotor 11 rotates. Any accumulated sand is stirred up by the finger 19 which thus keeps the sand moving upwardly with the flow of oil. The lower end of the sump 18 is provided with a seat 20, which in turn is closed by the ball check 21. A spring 22 engages the ball 21 and holds the ball seated so that normally the oil will flow downwardly into the sump 18 and thence upwardly into the tubing 12. Under normal load, the flow of oil is as stated. if the load becomes excessive, the ball 21 will unseat thus allowing the oil to switch downwardly and prevent sand from clogging the upward flow of oil. An adjusting screw 23 will vary the tension against the ball 21 and thus will adjust the load which is carried by the ball 21.

In FIG. 1, l have shown the position of the parts when the pump is lifting oil to the surface. If it is desired to remove the pump for repairs and the like, the tube 12 is lowered until the pins 15 enter the J slot 16, and the parts are locked on partial rotation of the tube 12 within the J slot 16. The pump is now raised to the surface by lifting on the tube 12. The projecting pins 15, when the pump is rotating, will agitate the oil and accumulated sand thus preventing clogging of the pump.

Having described my invention, I claim:

1. A rotary type fluid pump for fluids containing sand comprising a sleeve, means non-rotatably mounting said sleeve in a well, a pump in said sleeve including a rotor and a stator, a tubing rising from the pump, said tubing forming a portion of said rotor and receiving pumped fluid therethrough, means releasably coupling the tubing andthe sleeve, said pump having a sump therein, and a check valve in said sump.

2. A rotary type fluid pump for fluids as recited in claim 1, and said releasable means coupling the tubing and the sleeve consisting of a pin on the tubing and a J slot in the sleeve engagable by the pin.

3. A rotary type fluid pump for fluids as recited in claim 1, and said check valve including a spring pressed ball.

4. A rotary type fluid pump for fluids as recited in claim 1, and said releasable means coupling the tubing and the sleeve consisting of a pin on the tubing and a J slot in the sleeve engagable by the pin, and said check valve including a spring pressed ball.

5. A rotary type fluid pump for fluids as recited in claim 1, and said sump being positioned in the bottom of the sleeve to receive the upwardly flowing fluid in the pump.

6. A rotary type fluid pump for fluids as recited in claim 1, and said sump being positioned in the bottom of the sleeve to receive the upwardly flowing fluid in the pump, and a check valve means in the bottom of said sump.

a a 4: a: 

1. A rotary type fluid pump for fluids containing sand comprising a sleeve, means non-rotatably mounting said sleeve in a well, a pump in said sleeve including a rotor and a stator, a tubing rising from the pump, said tubing forming a portion of said rotor and receiving pumped fluid therethrough, means releasably coupling the tubing and the sleeve, said pump having a sump therein, and a check valve in said sump.
 2. A rotary type fluid pump for fluids as recited in claim 1, and said releasable means coupling the tubing and the sleeve consisting of a pin on the tubing and a J slot in the sleeve engagable by the pin.
 3. A rotary type fluid pump for fluids as recited in claim 1, and said check valve including a spring pressed ball.
 4. A rotary type fluid pump for fluids as recited in claim 1, and said releasable means coupling the tubing and the sleeve consisting of a pin on the tubing and a J slot in the sleeve engagable by the pin, and said check valve including a spring pressed ball.
 5. A rotary type fluid pump for fluids as recited in claim 1, and said sump being positioned in the bottom of the sleeve to receive the upwardly flowing fluid in the pump.
 6. A rotary type fluid pump for fluids as recited in claim 1, and said sump being positioned in the bottom of the sleeve to receive the upwardly flowing fluid in the pump, and a check valve means in the bottom of said sump. 